package com.itheima.common;


import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.sql.SQLIntegrityConstraintViolationException;

@Slf4j
@ControllerAdvice(annotations = {RestController.class, Controller.class})
//: 将方法的返回值 R 对象转换为json格式的数据, 响应给页面;
@ResponseBody
public class GlobalExceptionHandler {

    @ExceptionHandler(SQLIntegrityConstraintViolationException.class)
   public R<String>exceptionHandler(SQLIntegrityConstraintViolationException ex){

        log.error(ex.getMessage());

        if(ex.getMessage().contains("Duplicate entry")){
            String[] split = ex.getMessage().split(" ");
            String msg = split[2]+"已存在";
            return R.error(msg);
        }
        return R.error("未知的错误");
   }
    /**
     * 异常处理方法
     * @return  在全局异常处理器中增加方法，用于捕获我们自定义的异常 CustomException
     */
    @ExceptionHandler(CustomException.class)
    public R<String>excaptionHandler(CustomException ex){
        log.error(ex.getMessage());

        return R.error(ex.getMessage());
    }
}
